Schema Changes in Merge Replication

i am using merge push subscription.
i have to update/modify the schema in publication db.
So the changes in the publication db should be reflected in Subscriotion db.
i have more than 25 subscribers. How can i do the schema changes ?.
What are the things i have to do ?. I am little bit worried about data loss .

It depends on the schema changes you are intending, but pretty much most
things are permitted and will replicate just fine. Check that your articles
are set to replicate ddl changes first and then make the changes one by one
(if possible) and sync up.
HTH,
Paul Ibison